LG air conditioner errors

LG Air Conditioner Errors, which appear on the display screen of the indoor unit, briefly informs you which part of the air conditioner the problem is related to.

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Usually, these errors happen when you postpone your air conditioner service. Air conditioner service and maintenance is one of the most important factors in the lifetime and non-failure of the device, unfortunately, many people ignore these issues and incur high repair costs.
Note that these errors indicate the approximate location of the problem, and detailed troubleshooting must be done by the cooler repairman, because the exact cause of this occurrence must be identified and all factors must be completely eliminated.
LG air conditioner repair:

To repair your LG air conditioner, just contact the nearest branch of Tehran online service to your place of residence or send us your last name and mobile phone number through the service request form, and in less than an hour, an experienced technician will fix the problem. The problem is on the spot.
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If you also want to benefit from the discounts of our collection, send us the word “subscription” right now through the service request form to benefit from a 10% discount.

What does LG air conditioner error mean?

Air conditioner errors appear when there is a problem in the system, these errors are different for different brands, and they are different in different models of each brand. In the following, we have listed all the errors for you, dear ones, so that you can easily find the problem of your air conditioner.
What should we do if an error occurs in the LG air conditioner:

Usually, many air conditioners may have problems due to long-term operation and overheating of the board, which leads to errors. Therefore, our first suggestion is to first turn off the air conditioner through the remote control, then unplug it completely, and then turn off the power source (if any) by pressing the buttons on the air conditioner several times. . Then let it stay for about half an hour. This helps to completely drain the memory and CPU and the so-called reset. Now turn on the air conditioner and use it.

If the LG air conditioner error persists or reappears after a while, do not reset or tamper with it, but contact your service provider.
Types of LG air conditioner errors:

Bugs in the motor and fan inside and outside
Sensors of the outer sector
Internal sensors
Compressor temperature control switch
Voltage sensor
The inverter is not working properly
Abnormal system behavior
Internal and external unit connection failure
EEPROM memory failure
Power supply circuit voltage drop

LG air conditioner error code, the cause of the LG air conditioner error code
01 A connection in the air sensor / open air sensor
02 In this error, the problem is with the input thermistor of the coil of the indoor unit. / The inlet pipe sensor may be open or have a connection.
03 There is a problem in the communication between the indoor unit and the control panel of the device
04 The error code CH04 indicates that the fan coil float switch has increased. / The floating key has made a connection.
05 This error code indicates a communication failure between indoor and outdoor units. / appears about 5 minutes after turning on the system.
06 The pipe sensor in the external unit has a connection or is open.
07 There is a difference between the operation of the device and the settings of the indoor unit.
07 Check for loose connections or dry joints where the EEPROM connects to the main PCB. Troubleshooting LG air conditioner error code 09: If possible, it will be repaired if the PCB is replaced.
10 internal fan motor problems
21 This error is caused by the current in the DC converter circuit. / If the DC part of the circuit is more than 14 amps, error 21 will be displayed.
22 This error is observed by an excessive current in the compressor.
23 This error indicates an error in the DC part of the circuit. / means that the DC voltage to the inverter is less than 140 V DC, this error can be seen in 370 V single-phase devices and 600 V DC three-phase devices.
24 This pressure switch is open or has a connection.
25 This error indicates a problem in the power supply entering the system.
26 This error indicates a problem with the inverter compressor positioning system, indicating a faulty compressor.
27 This error indicates a problem in the inverter module. / Check the section about test converters. / Also check the reactor (attached to the panel) and check its resistance and test it well with an ohm.
28 This error indicates a problem in the DC part of the circuit. / means that the DC voltage to the inverter is too high.
29 Over-operation (pipe restrictions / air flow restriction / EEV defect / over pressure / compressor damage and its test (insulation damage / motor damage) / low input voltage / PCB inverter assembly damage
32 This error indicates that the discharge temperature of the inverter compressor is high. (more than 105 degrees Celsius) This error usually indicates that the system has a lack of refrigerant or a blockage in the system.
33 This error indicates that the discharge speed of the compressor is high, and this error code usually indicates that the system has a lack of refrigerant or a blockage in the system.
39 Check and repair or replace if necessary: ​​PCB defect / wiring defect / different Micom software version / ODU Inverter PCB assembly problem
40 This error indicates a problem with the current drawn by the AC portion of the inverter circuit.
41 This error indicates an inverter compressor discharge thermistor error.
44 indicates an error of the air conditioner thermistor in the outdoor unit.
45 shows a problem in the condenser coil output terminator. / LG air conditioner pipe sensor has a connection or is open.
46 indicates a problem with the compressor suction thermistor. / The suction pipe sensor is open or has a connection.
47 shows inverter compressor discharge terminator error. / The common pipe sensor is open or has a connection.
48 This error indicates that the compressor discharge sensor and the condenser air temperature sensors are both disconnected. / Both of these sensors are connected to a single connector on the outdoor PCB, connect it to clear the error.
51 This indicates that the indoor unit capacity is too large for the compact unit. / refers to device overload.
52 This error code indicates a communication error between the main and replacement CPU on the main PCB of the outdoor unit.
53 problems in the connection between indoor and outdoor units
54 This error typically indicates a missing phase or the phases are reversed on the power supply by up to three phases. / The cooler phase cable may have been interrupted.
60 If the PCB assembly installation is correct, check the dry liquid, if nothing is found, replace the outdoor unit PCB.
61 shows that the outdoor air temperature of the condenser cooler is above 65 degrees Celsius. This is usually experienced in cooling mode and indicates insufficient air in the coil.
62 is an error in the outdoor unit and the inverter heating thermistor has indicated that the heat is over 85°C.
63 This code indicates that the temperature in the sensor is a conductor pipe.
65 The problem is the thermal thermistor of the inverter PCB and the cooling unit in the open space PCB has a problem.
67 This is an external unit motor problem where rotation is not detected and can lead to mechanical or electrical failure.
73 Over-operation (Pipe restrictions / Air flow restriction / Malfunction / EEV overpressure / Compressor damage (Insulation damage / Motor damage) / Input voltage is abnormal. / Power supply wiring is abnormal. / Damage to PCB assembly inverter
105 This error is due to a communication error between the main outdoor PCB and the fan PCB.

LG inverter air conditioner error code, the cause of the LG inverter air conditioner error code
CH01 This error code is related to the indoor air sensor.
CH02 This error code is related to the indoor unit inlet pipe sensor.
CH05 This error code is related to the malfunction of indoor and outdoor unit communication.
CH06 This error code is related to the failure of the outlet pipe sensor of the indoor unit.
CH09 This error code is related to the option board.
CH10 This error code is related to internal fan motor failure.
CH12 This error code is related to the failure of the middle pipe sensor of the indoor unit.
CH21 This error code is related to high DC voltage.
CH22 This error code is related to excessive increase of input current.
CH23 This error code is related to low DC voltage.
CH26 This error code is related to phase current in the device.
CH27 This error code is related to PSC error high current error.
CH32 This error code is related to the high temperature of the compressor heat pipe.
CH40 This error code indicates that the CT sensor is open or connected.
CH41 This error code is related to the heat pipe sensor.
CH44 This error code is related to the air temperature sensor.
CH45 This error code is related to the condenser tube sensor.
CH46 This error code is related to the failure of the suction pipe sensor.
CH53 This error code is related to the communication problem between outdoor and indoor unit.
CH60 This error code is related to EEPROM error.
CH61 This error code is related to the high temperature of the condenser tube sensor.
CH62 This error code is related to the high temperature of the external heatsink.
CH65 This error code is related to sink sensor heat.
CH67 There is no return signal of BLDC fan operation.

Error code and specifications of LG inverter LSN series air conditioner:
Error Code Error Description Number of light flashes
1 Connecting or not connecting the thermistor of the indoor unit 1x
2 connecting or not connecting the thermistor of the external unit 2x
5. Lack of communication between the indoor unit and the outdoor unit 5x
9 Internal unit memory (EEPROM) error 9x
10 Internal fan error locked or stopped or running at low speed

Error code Error description
The light is green once, the indoor air sensor is broken
The double green light of the internal pipe unit sensor is broken
Green light five times error in communication between indoor unit and outdoor unit
The six-time green light of the return pipe sensor of the indoor unit is defective
The green light is nine times error in the board
The red light once on the internal blower motor has a problem
The light is red once and green twice. The sensor in the middle of the tube of the indoor unit has a problem

Error indication Error code description
Indoor unit
LED2 (red) LED1 (green)
- 1 time indoor unit air sensor open/short circuit 1
- 2 times indoor unit inlet pipe sensor open/short connection 2
- 5 bar sensor of inlet pipe of indoor unit and outdoor unit 5
- 6 times the sensor of the external tube of the internal unit 6
- 9 times EEPROM internal unit 9
1 time — malfunction of the internal fan motor 10
1 time 2 times sensor in the middle of the indoor unit pipe

Error symptom Description of the error code
External device (KW 2,4) Internal device (SB/SC)
Green Red LED1 LED2
- 1 time — indoor air sensor (open/connected) 1
– 2 times — Inlet pipe sensor of the internal device (open/connected) 2
– 5 times — Errors in communication (internal device↔external device) 5
– 6 times — Sensor of the outlet pipe of the internal device (open/connected) 6
– 9 times — internal device EPROM error 9
– — — 1 time internal fan lock error 10
– 2 times 1 time middle pipe sensor of internal device (open/connected)

LG air conditioner FL error:

This message is related to filling the water tank of portable coolers. A drain pipe is not connected to portable coolers to drain moisture, because there is a tank inside the device, and after the tank is full, the device displays the message (FULL WATER).
After seeing this message, first open the plastic cover on the back of the device counterclockwise.
Then pull the second cap (rubber cap) outward to remove it and drain the water.
LG air conditioner CO message:

When you activate the Auto clean program on the device control, after turning off the cooler, the device enters the “automatic cleaning” stage;
In this case, the damper or the air exit valve from the panel remains half-closed and the fan rotates at a low speed. Fan circulation to remove moisture is only done in cooling mode or dehumidification function.
In this case, the CO message will appear on the control display (for half an hour on the control display and for some devices on the panel display as well.) and when the Auto clean phase is finished, the device will turn off.